Joel A.C. Baum's Home Page


Professor of Strategic Management


Rotman School of Management

Strategic Management Area

University of Toronto



“The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task it has a rudimentary nervous system. When it finds its spot and takes root it doesn't need its brain anymore so it eats it. It's rather like getting tenure.” neuroscientist, Rodolfo Llinas as elaborated by Daniel C. Dennett in Consciousness Explained




The Epistemic Structure and Dynamics of Social Networks

cover for Epinets

Check out my recent book, now available in paperback, here

Read the introduction here


What reviewers are saying:


Epinets is a demanding and brilliant book. It demands and deserves from its audience a very close read… Epinets is a remarkably smart and creative book that is likely to shape the intellectual landscape far into the future. We strongly encourage others to read and especially to use it.” Matthew S. Bothner and Henning Piezunka. Administrative Science Quarterly.

“In Epinets, Moldoveanu and Baum aggressively dial up the cognitive turn in sociology by showing how fundamentally “social” concepts, from trust and status to brokerage, closure, and various configurations of social organization, have roots in interactive social epistemology… The book is imperfect, but the scope of the epinets research program no less than thrilling. I do not believe that I will ever view social networks in the same way again… the vision is compelling. I highly recommend this book.” James A. Evans. American Journal of Sociology.


View my CV or research pages at ResearchGate, Google Scholar and SSRN

My research focuses on patterns of competition and cooperation among firms, and their influence on firm behavior and learning.  My current projects include:

Securities Analyst Networks

A project examining the impact and dynamics of securities analyst networks, in particular, the influence of multipoint contact on competition among analysts for investor attention and status. 

Peer Production Networks

A project investigating the effectiveness of peer production networks for software development, and specifically of the network of software developers debugging Mozilla’s Firefox browser.

Game of Thrones

A series of short articles exploring various facets of the evolving social network among the series characters, and the influence of their positions in the network on their fates over Seasons 1-7 and in Season 8. Articles are available here.  

Last modified August 2018

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